Fracture Surface Roughness of Ti-Scaffold Filaments with Different Microporosity

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F25%3A00643881" target="_blank" >RIV/68081723:_____/25:00643881 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.prostr.2025.10.031" target="_blank" >http://dx.doi.org/10.1016/j.prostr.2025.10.031</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.prostr.2025.10.031" target="_blank" >10.1016/j.prostr.2025.10.031</a>

Result language

angličtina

Original language name

Fracture Surface Roughness of Ti-Scaffold Filaments with Different Microporosity

Original language description

Scaffolds are 3D metallic porous structures produced by additive manufacturing that find applications in biomedicine as the bone implants. The previous research has shown that the titanium scaffolds with porous filaments (14% microporosity) exhibited better fatigue resistance than those with compact filaments (6% microporosity). This was primarily attributed to fatigue crack growth shielding mechanisms induced by crack-pore interactions and by an extension of fatigue crack path in the porous filaments. A quantification of these effects demands a determination of fracture surface roughness parameters of both types of filaments, which is the main aim of this article. Selected roughness parameters S <inf>a</inf> (arithmetical mean height), S <inf>v</inf> (maximum valley depth) and S<inf>dr</inf> (developed interfacial area ratio) of fracture surfaces of scaffold filaments after cyclic three-point bending tests were determined using the confocal laser microscope Olympus LEXT™ OLS5100 according to ISO 25178. Each sample was subjected to 7 measurements on small surfaces of size 4500 µm² spread over the fatigue fracture surface and the average value with the standard deviation was computed. All the average values of roughness parameters for the porous samples were found to be higher than those for the compound fibers. These parameters decreased with an increasing number of cycles to fracture N <inf>f</inf> in the range N <inf>f</inf> ϵ (10², 10⁵). The statistical analysis of fracture surface roughness will serve as a benchmark for a currently developed model of the fatigue crack growth in metallic materials of variable porosity which will improve our understanding the mechanistic response of scaffolds and enable the optimization of their microporosity.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Procedia Structural Integrity

ISBN

—

ISSN

2452-3216

e-ISSN

—

Number of pages

6

Pages from-to

"Roč. 74 (2025)"

Publisher name

Elsevier B.V.

Place of publication

Amsterdam

Event location

Brno

Event date

Jun 23, 2025

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

—